CVE-2026-6040

Heap use-after-free in ODF number-format blank-width parsing

HIGH
7.3
CVSS Score
Published: June 15, 2026 at 04:21 PM UTC
Updated: October 25, 2026 at 11:10 PM UTC
1 product affected across 1 vendorLibreOffice

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Severity
HIGH7.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

25.8 ≤ v < < 25.8.726.2 ≤ v < < 26.2.325.826.2
Affected range stops below < 25.8.7, so it looks safe — our inference, not a vendor statement
Affected range stops below < 26.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHredhat-SADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-416CWE-787CWE-825

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